Yujiulü Hulü

Marriage to Northern Yan princess There is historical indication that Yujiulü Hulü (郁久閭斛律) began his rule in May 410 and, the following year, offered a tribute of three thousand horses to the Northern Yan ruler Feng Ba, with a request to marry Feng Ba's daughter, Princess Lelang (樂浪公主), who was probably the daughter of Feng Ba's wife, Princess Sun. Feng Ba's brother, Feng Sufu, suggested refusing the request and sending the daughter of one of Feng Ba's concubines instead, but Feng Ba was apparently convinced that an alliance with the Rouran would be beneficial to his state, and agreed to marry Princess Lelang to Yujiulü Hulü in 411.

Meanwhile Buluzhen sent Yujiulü Hulü and his daughter to the Northern Yan. Feng Ba treated him as an honored guest and, as originally planned, took Yujiulü's daughter, Zhaoyi (昭仪), as a concubine. Yujiulü Hulü requested that Feng Ba send an army to escort him home and, in May 414, Feng Ba, with some reluctance, gave him an escort commanded by general Wan Ling (萬陵) who, according to the account, returned after having killed Yujiulü Hulü along the way.